The solution to the problem of high silicon aluminium welding

The solution to the problem of high silicon aluminium welding

Today by the aluminum plate manufacturer Haomei aluminum for everyone to explain the solution to the high silicon aluminum welding problems: laser welding.

There have been studies show that high silicon aluminum materials need to be connected using low power fusion welding method, due to the high content of Si elements in the alloy, the weld metal organization will form needle-like eutectic silicon and coarse plate polygonal primary silicon, seriously cut the matrix; near the seam area of the metal is prone to overheating, grain growth phenomenon, resulting in welding mechanical properties significantly reduced and lost value. Laser welding has the advantages of high power density, weld depth to width ratio, small heat-affected zone, smaller shrinkage and deformation of the workpiece, fast welding speed, this welding method is suitable for high silicon aluminum welding. Some scientists have studied the organization and performance of the ZL109 silicon aluminum alloy CO2 laser welding joints, the weld organization is dense, fine grain joints, welding heat input on the mechanical properties of the joint has a significant impact, heat input increases, the joint tensile strength and elongation after break are first increased and then decreased, when the heat input is 44J/mm tensile strength and elongation after break reached a maximum, respectively 121.2 MPa and 4.3% respectively.